SF: Generate stable display IDs using EDID
The display IDs generated by HWC are opaque handles. In order for SF and
eventually DisplayManagerService to keep track of more than two displays
and recognize previously seen displays, displays should be given stable
and persistent IDs.
If the HWC supports IComposerClient.getDisplayIdentificationData, SF
parses the EDID structure to generate stable display IDs, which will
be used in a follow-up CL to replace HWC_DISPLAY_{PRIMARY,EXTERNAL}.
Bug: 74619554
Test: dumpsys SurfaceFlinger --display-identification
Test: libsurfaceflinger_unittest
Change-Id: I1a710e2efcf1581fabe48ab96a0eb4e7a5163c0c
diff --git a/services/surfaceflinger/DisplayHardware/ComposerHal.cpp b/services/surfaceflinger/DisplayHardware/ComposerHal.cpp
index 37ba433..9a9a5c3 100644
--- a/services/surfaceflinger/DisplayHardware/ComposerHal.cpp
+++ b/services/surfaceflinger/DisplayHardware/ComposerHal.cpp
@@ -22,7 +22,6 @@
#include "ComposerHal.h"
-#include <android/hardware/graphics/composer/2.2/IComposer.h>
#include <composer-command-buffer/2.2/ComposerCommandBuffer.h>
#include <gui/BufferQueue.h>
#include <hidl/HidlTransportUtils.h>
@@ -172,22 +171,31 @@
LOG_ALWAYS_FATAL("failed to get hwcomposer service");
}
- mComposer->createClient(
- [&](const auto& tmpError, const auto& tmpClient)
- {
- if (tmpError == Error::NONE) {
- mClient = tmpClient;
- }
- });
- if (mClient == nullptr) {
- LOG_ALWAYS_FATAL("failed to create composer client");
+ if (sp<IComposer> composer_2_3 = IComposer::castFrom(mComposer)) {
+ composer_2_3->createClient_2_3([&](const auto& tmpError, const auto& tmpClient) {
+ if (tmpError == Error::NONE) {
+ mClient = tmpClient;
+ mClient_2_2 = tmpClient;
+ mClient_2_3 = tmpClient;
+ }
+ });
+ } else {
+ mComposer->createClient([&](const auto& tmpError, const auto& tmpClient) {
+ if (tmpError != Error::NONE) {
+ return;
+ }
+
+ mClient = tmpClient;
+ if (sp<V2_2::IComposer> composer_2_2 = V2_2::IComposer::castFrom(mComposer)) {
+ mClient_2_2 = V2_2::IComposerClient::castFrom(mClient);
+ LOG_ALWAYS_FATAL_IF(mClient_2_2 == nullptr,
+ "IComposer 2.2 did not return IComposerClient 2.2");
+ }
+ });
}
- // 2.2 support is optional
- sp<IComposer> composer_2_2 = IComposer::castFrom(mComposer);
- if (composer_2_2 != nullptr) {
- mClient_2_2 = IComposerClient::castFrom(mClient);
- LOG_ALWAYS_FATAL_IF(mClient_2_2 == nullptr, "IComposer 2.2 did not return IComposerClient 2.2");
+ if (mClient == nullptr) {
+ LOG_ALWAYS_FATAL("failed to create composer client");
}
if (mIsUsingVrComposer) {
@@ -957,6 +965,30 @@
return error;
}
+// Composer HAL 2.3
+
+Error Composer::getDisplayIdentificationData(Display display, uint8_t* outPort,
+ std::vector<uint8_t>* outData) {
+ if (!mClient_2_3) {
+ return Error::UNSUPPORTED;
+ }
+
+ Error error = kDefaultError;
+ mClient_2_3->getDisplayIdentificationData(display,
+ [&](const auto& tmpError, const auto& tmpPort,
+ const auto& tmpData) {
+ error = tmpError;
+ if (error != Error::NONE) {
+ return;
+ }
+
+ *outPort = tmpPort;
+ *outData = tmpData;
+ });
+
+ return error;
+}
+
CommandReader::~CommandReader()
{
resetData();